Microsensor Earth1006, Руководство по эксплуатации

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Use a Phillips screwdriver to remove the fastening screws (12pcs) that
secure the top cover to the housing, and then open the top cover.
Attention: the top cover and housing are connected by FPC flat wire.
Step 2: Remove the FPC flat wire from the control PCB socket of top
cover. (it is OK to skip to step 3)
Step 3: install SIM card
Turn over the top cover and find the communication PCB. Tap the yellow
key of SIM card holder in communication PCB, popping up the card slop
and then install the SIM card. After installation, please plug the FPC wire
back to the socket.
Attention: Be sure to disconnect the power when operating.
Step 4: install the top cover
Tighten the rubber sealing ring and secure the cover back to the lower
housing with the fastening screws.
Step 5: fastening screw
Use a Phillips screwdriver to tighten the captive screws (12pcs) between
top cover and housing.
Attention: For reliable protection, rubber sealing ring cannot be
dislocated.